Automatic cut-off for gas-burners



' (No Model.)

C. RATE A AUTOMATIC GUT-OPP POR GAS BURNERS.

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CHARLES RATH, OF CHICAGO, ILLINOIS.

AUTOMATIC CUT-OFF FOR GAS-BURNERS.

SPECIFICATION forming part of Letters Patent No. 488,949, dated December27, 1892.

Application tiled April 18, 1892- To all whom it may concern.-

Be it known that I, CHARLES BATH, of Chicago, county of Cook, State ofIllinois, have invented certain new and useful Improvements in AutomaticOut-O lits for Gas-Cocks, of which the following is hereby declared tobe a full, clear, and exact description, sufficient to enable othersskilled in the art to which such invention appertains to make and usethe same.

My invention designs to provide an automatic cut-off in connection withthe stop-cock of a gas service pipe, the purpose beingto close the cockif for any reason the lighted jet should be blown out. To such end thelanie of the burning jet is directed against ametal or other like rod,comparatively indestructible and which expands under iniiuence of theheat and dogs the gas-cock to keep it open. When the flame isaccidentally extinguished, the rod quickly contracts from doggingposition thus releasing the cock and allowing the same to be closedautomatically by a suitable actuator then in play. The further escape ofgas at the jet is thereby prevented and the dangers and objections froman accumulation of unburned gas in basements, ware-houses or likesituations are entirely prevented.

The exact nature of the improvements will appear from the descriptionfollowing and be thereafter pointed out by claim at the conclusionthereof.

In the accompanying drawings forming part of the specification likefeatures of structure are denoted by like designation throughout.

Figure l is a view in side elevation and Fig. 2 a plan view of a gascock provided with an automatic cut oif in accordance with theinvention. Fig. 3 is a View in side elevation (with parts in section)showing modified forni of the improvement.

Within the service pipe A is set the gas cock B of usual structure anddesigned to control the escape of gas from the ordinary jet C. Theservice pipe A may be conveniently furnished with a bracket liketerminal D which in connection with the support E serves to sustain therod F in near proximity to the iiame of the jet C. The rod F is of brassor other material easily expanded by heat and is adjusted at desiredposition through the eyes of the bracket D and support E by means of theset Serial No. 429,589. (No model.)

nuts ef. At its opposite or free end the rod F can be caused to extendinto one of the series of notches occurring at intervals about the rimof the radius plate G.

As appears from the drawings (Figs. 1-2) the plate G is fitted to thestein-like terminal of the barrel of gas cock B and is there firmly heldby means of the set nut g. A spring H extends as shown between the leverend 71) of the radius plate G and a collarficonveniently secured to theservice pipe A. By turning the gas cock B to open position, against thestress of the spring H and lighting the jet C, the flame quickly expandsthe rod F causing the free end thereof to project into the path of thenotched radius plate G, and serving thus to dog the plate and with itthe gas cock B in open position. The notches upon the radius plate Gpermit the gas cock to be set and held either at full feed position orfor lesser supply of gas as may be desired. Should the Iiame at the jetO be extinguished for any reason, thus allowing the escape of unburnedgas, into the apartment, the rod F quickly contracts, and is withdrawnfrom its (logging engagement with the radius plate G. Thereupon thespring I-I comes into play, shifting the lever end 7L of the radiusplate and with it also the gas cock B, which latter closes completely,and prevents the further escape of gas at the jet O.

As appears from Fig. 3, the barrel of the gas cock B can be extended toform a steinlike terminal l) about which the spring I is arranged incoil, being secured at its ends respectively to the stem b and to theservice pipe A, or to the housing of the gas cock. The plate G issecured as before by nut gin fixed position upon the barrel of the gascock B and is notched to receive the flogging end of the thermostaticrod F. Except for the minor change noted in the arrangement of the coilspring, the organization and operation of the parts remain substantiallyunchanged. The iiame at the jet C acts upon the rod F and by expansionthereof (while the key of the cock is held temporarily open) causes thefree terminal of the rod to dog the opposite notch in the plate G andthereby keeps the gas cock open while the iiame continues. If it isblown out the rod F speedily contracts, thus releas- IOO 1o secured tothe cock plug, and a thermostatic rod'rnounted in position above saidjet and having its free terminal directly dogging a notch of said platewhereby the plug is held adjustably open against the stress of itsspring yWhile the gas is burning', substantially as de- 15 scribed.

CHARLES RATH.

Witnesses:

ANTHONY ATWooD CUMMINS, HENRY BOWEN.

